Sjoqvist, E and Pati, A K and Ekert, A and Anandan, J S and Ericsson, M and Oi, D K L and Vedral, V (2000) Geometric phases for mixed states in interferometry. Physical Review Letters, 85 (14). pp. 2845-2849. ISSN 0031-9007
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.85.2845
Abstract
We provide a physical prescription based on interferometry for introducing the total phase of a mixed state undergoing unitary evolution, which has been an elusive concept in the past. We define the parallel transport condition that provides a connection form for obtaining the geometric phase for mixed states. The expression for the geometric phase for mixed state reduces to well known formulas in the pure state case when a system undergoes noncyclic and unitary quantum evolution.
| Item type: | Article |
|---|---|
| ID code: | 35349 |
| Keywords: | quantum physics, neutrons, interferometry, geometric phases , Optics. Light, Physics |
| Subjects: | Science > Physics > Optics. Light Science > Physics |
| Department: | Faculty of Science > Physics |
| Related URLs: | |
| Depositing user: | Pure Administrator |
| Date Deposited: | 03 Nov 2011 16:21 |
| Last modified: | 06 Oct 2012 09:37 |
| URI: | http://strathprints.strath.ac.uk/id/eprint/35349 |
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